[uf-discuss] Is class="vcard fn" illegal?

[Costello, Roger L.]

Hi Folks,

I ran this through Brian Suda's xhtml2vcard.xsl tool and it gave no
output:

<cite class="vcard fn">Mr. John Q. Public, MD</cite>

Why is it not legal?  

I thought that I could optimize using multiple property names in a
class attribute?  

I guess I don't understand when multiple property names can and cannot
be used in a class attribute.  Would someone please explain the rule?

/Roger